SCRH74B-102 Equivalent & Substitute Parts

Part Overview

The SCRH74B-102 is a 1 mH shielded inductor manufactured by Signal Transformer, designed for surface mount applications requiring fixed inductance in compact form factors. This component is rated for 180 mA continuous current with a maximum DC resistance of 6 ohms and operates across the temperature range of -40°C to 125°C. The part maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating.

Substitute parts are identified when equivalent electrical performance can be maintained within the specified parameter tolerances while meeting or exceeding the original component's operational requirements.

Substiute Parts

SCRH74B-102

Signal TransformerIn Stock: 1145SCRH74B-102 Datasheet

Current PartRFQ

SPD74R-105M

API Delevan Inc.In Stock: 2151SPD74R-105M Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The SPD74R-105M qualifies as a direct substitute for the SCRH74B-102 based on the following electrical and mechanical compatibility criteria:

Matching Parameters:

• Inductance value: 1 mH at 1 kHz test frequency
• Inductance tolerance: ±20%
• DC resistance: 6 ohm maximum
• Shielding classification: Shielded
• Mounting type: Surface Mount
• RoHS3 compliance status
• Moisture sensitivity level: 1 (Unlimited)

Enhanced Parameters:

• Current rating: 280 mA (exceeds 180 mA requirement)
• Current saturation: 280 mA (exceeds 180 mA requirement)
• Operating temperature range: -55°C to 125°C (extends lower bound from -40°C)

The substitute part maintains all critical electrical specifications while providing increased current handling capacity and extended low-temperature operation, making it suitable for applications requiring the SCRH74B-102.

Parameter Comparison

Engineering Selection Recommendations

The SPD74R-105M is qualified as a substitute for the SCRH74B-102 based on electrical parameter equivalence and regulatory compliance alignment. Both components maintain ROHS3 compliance, unlimited moisture sensitivity rating, and identical inductance specifications at the 1 kHz test frequency.

The substitute part provides enhanced current handling capacity (280 mA versus 180 mA) and extended operating temperature range (-55°C to 125°C versus -40°C to 125°C), making it suitable for applications where the original part is specified. The physical dimensions differ slightly, with the substitute being smaller in footprint (7.30 x 7.30 mm versus 7.80 x 7.80 mm) but marginally taller in seated height (4.70 mm versus 4.50 mm).

Component selection should account for PCB layout constraints and thermal management requirements specific to the application.

Frequently Asked Questions (FAQ)

Q: What makes SPD74R-105M a valid substitute for SCRH74B-102?

A: The SPD74R-105M meets all critical electrical parameters: 1 mH inductance at ±20% tolerance, 6 ohm maximum DC resistance, shielded construction, and surface mount packaging. Both components operate across overlapping temperature ranges and maintain identical RoHS3 compliance and moisture sensitivity ratings.

Q: Can I use SPD74R-105M in applications rated for 180 mA?

A: Yes. The SPD74R-105M is rated for 280 mA continuous current and 280 mA saturation current, exceeding the 180 mA requirement of the original specification.

Q: Are there physical compatibility concerns?

A: The substitute part has a smaller footprint (7.30 x 7.30 mm versus 7.80 x 7.80 mm) but is marginally taller when seated (4.70 mm versus 4.50 mm). PCB layout and component clearance must be verified for your specific application.

Q: Do both parts have the same regulatory compliance?

A: Yes. Both SCRH74B-102 and SPD74R-105M are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes.

Q: What is the inductance test frequency for both parts?

A: Both components are tested at 1 kHz for inductance specification verification.

Q: Can the substitute operate at lower temperatures than the original?

A: Yes. The SPD74R-105M operates from -55°C to 125°C, extending the lower temperature limit by 15°C compared to the SCRH74B-102 range of -40°C to 125°C.